coreutils/install.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Copyright (C) 2003 by Glenn McGrath <bug1@iinet.net.au>
   4  * SELinux support: by Yuichi Nakamura <ynakam@hitachisoft.jp>
   5  *
   6  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
   7  *
   8  * TODO: -d option, need a way of recursively making directories and changing
   9  *           owner/group, will probably modify bb_make_directory(...)
  10  */
  11
  12 #include <libgen.h>
  13 #include <getopt.h> /* struct option */
  14
  15 #include "libbb.h"
  16 #include "libcoreutils/coreutils.h"
  17
  18 #if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
  19 static const char install_longopts[] ALIGN1 =
  20         "directory\0"           No_argument       "d"
  21         "preserve-timestamps\0" No_argument       "p"
  22         "strip\0"               No_argument       "s"
  23         "group\0"               No_argument       "g"
  24         "mode\0"                No_argument       "m"
  25         "owner\0"               No_argument       "o"
  26 #if ENABLE_SELINUX
  27         "context\0"             Required_argument "Z"
  28         "preserve_context\0"    No_argument       "\xff"
  29         "preserve-context\0"    No_argument       "\xff"
  30 #endif
  31         ;
  32 #endif
  33
  34
  35 #if ENABLE_SELINUX
  36 static bool use_default_selinux_context = 1;
  37
  38 static void setdefaultfilecon(const char *path)
  39 {
  40         struct stat s;
  41         security_context_t scontext = NULL;
  42
  43         if (!is_selinux_enabled()) {
  44                 return;
  45         }
  46         if (lstat(path, &s) != 0) {
  47                 return;
  48         }
  49
  50         if (matchpathcon(path, s.st_mode, &scontext) < 0) {
  51                 goto out;
  52         }
  53         if (strcmp(scontext, "<<none>>") == 0) {
  54                 goto out;
  55         }
  56
  57         if (lsetfilecon(path, scontext) < 0) {
  58                 if (errno != ENOTSUP) {
  59                         bb_perror_msg("warning: failed to change context of %s to %s", path, scontext);
  60                 }
  61         }
  62
  63  out:
  64         freecon(scontext);
  65 }
  66
  67 #endif
  68
  69 int install_main(int argc, char **argv);
  70 int install_main(int argc, char **argv)
  71 {
  72         struct stat statbuf;
  73         mode_t mode;
  74         uid_t uid;
  75         gid_t gid;
  76         char *arg, *last;
  77         const char *gid_str;
  78         const char *uid_str;
  79         const char *mode_str;
  80         int copy_flags = FILEUTILS_DEREFERENCE | FILEUTILS_FORCE;
  81         int flags;
  82         int ret = EXIT_SUCCESS;
  83         int isdir;
  84 #if ENABLE_SELINUX
  85         security_context_t scontext;
  86 #endif
  87         enum {
  88                 OPT_CMD           =  0x1,
  89                 OPT_DIRECTORY     =  0x2,
  90                 OPT_PRESERVE_TIME =  0x4,
  91                 OPT_STRIP         =  0x8,
  92                 OPT_GROUP         = 0x10,
  93                 OPT_MODE          = 0x20,
  94                 OPT_OWNER         = 0x40,
  95 #if ENABLE_SELINUX
  96                 OPT_SET_SECURITY_CONTEXT = 0x80,
  97                 OPT_PRESERVE_SECURITY_CONTEXT = 0x100,
  98 #endif
  99         };
 100
 101 #if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
 102         applet_long_options = install_longopts;
 103 #endif
 104         opt_complementary = "s--d:d--s" USE_SELINUX(":Z--\xff:\xff--Z");
 105         /* -c exists for backwards compatibility, it's needed */
 106
 107         flags = getopt32(argv, "cdpsg:m:o:" USE_SELINUX("Z:"),
 108                         &gid_str, &mode_str, &uid_str USE_SELINUX(, &scontext));
 109         argc -= optind;
 110         argv += optind;
 111
 112 #if ENABLE_SELINUX
 113         if (flags & OPT_PRESERVE_SECURITY_CONTEXT) {
 114                 use_default_selinux_context = 0;
 115                 copy_flags |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
 116                 selinux_or_die();
 117         }
 118         if (flags & OPT_SET_SECURITY_CONTEXT) {
 119                 selinux_or_die();
 120                 setfscreatecon_or_die(scontext);
 121                 use_default_selinux_context = 0;
 122                 copy_flags |= FILEUTILS_SET_SECURITY_CONTEXT;
 123         }
 124 #endif
 125
 126         /* preserve access and modification time, this is GNU behaviour, BSD only preserves modification time */
 127         if (flags & OPT_PRESERVE_TIME) {
 128                 copy_flags |= FILEUTILS_PRESERVE_STATUS;
 129         }
 130         mode = 0666;
 131         if (flags & OPT_MODE)
 132                 bb_parse_mode(mode_str, &mode);
 133         uid = (flags & OPT_OWNER) ? get_ug_id(uid_str, xuname2uid) : getuid();
 134         gid = (flags & OPT_GROUP) ? get_ug_id(gid_str, xgroup2gid) : getgid();
 135         if (flags & (OPT_OWNER|OPT_GROUP))
 136                 umask(0);
 137
 138         /* Create directories
 139          * don't use bb_make_directory() as it can't change uid or gid
 140          * perhaps bb_make_directory() should be improved.
 141          */
 142         if (flags & OPT_DIRECTORY) {
 143                 while ((arg = *argv++) != NULL) {
 144                         char *slash = arg;
 145                         while (1) {
 146                                 slash = strchr(slash + 1, '/');
 147                                 if (slash)
 148                                         *slash = '\0';
 149                                 if (mkdir(arg, mode | 0111) == -1) {
 150                                         if (errno != EEXIST) {
 151                                                 bb_perror_msg("cannot create %s", arg);
 152                                                 ret = EXIT_FAILURE;
 153                                                 break;
 154                                         }
 155                                 } /* dir was created, chown? */
 156                                 else if ((flags & (OPT_OWNER|OPT_GROUP))
 157                                  && lchown(arg, uid, gid) == -1
 158                                 ) {
 159                                         bb_perror_msg("cannot change ownership of %s", arg);
 160                                         ret = EXIT_FAILURE;
 161                                         break;
 162                                 }
 163                                 if (!slash)
 164                                         break;
 165                                 *slash = '/';
 166                         }
 167                 }
 168                 return ret;
 169         }
 170
 171         if (argc < 2)
 172                 bb_show_usage();
 173
 174         last = argv[argc - 1];
 175         /* coreutils install resolves link in this case, don't use lstat */
 176         isdir = stat(last, &statbuf) < 0 ? 0 : S_ISDIR(statbuf.st_mode);
 177
 178         while ((arg = *argv++) != NULL) {
 179                 char *dest = last;
 180                 if (isdir)
 181                         dest = concat_path_file(last, basename(arg));
 182                 if (copy_file(arg, dest, copy_flags)) {
 183                         /* copy is not made */
 184                         ret = EXIT_FAILURE;
 185                         goto next;
 186                 }
 187
 188                 /* Set the file mode */
 189                 if ((flags & OPT_MODE) && chmod(dest, mode) == -1) {
 190                         bb_perror_msg("cannot change permissions of %s", dest);
 191                         ret = EXIT_FAILURE;
 192                 }
 193 #if ENABLE_SELINUX
 194                 if (use_default_selinux_context)
 195                         setdefaultfilecon(dest);
 196 #endif
 197                 /* Set the user and group id */
 198                 if ((flags & (OPT_OWNER|OPT_GROUP))
 199                  && lchown(dest, uid, gid) == -1
 200                 ) {
 201                         bb_perror_msg("cannot change ownership of %s", dest);
 202                         ret = EXIT_FAILURE;
 203                 }
 204                 if (flags & OPT_STRIP) {
 205                         char *args[3];
 206                         args[0] = (char*)"strip";
 207                         args[1] = dest;
 208                         args[2] = NULL;
 209                         if (spawn_and_wait(args)) {
 210                                 bb_perror_msg("strip");
 211                                 ret = EXIT_FAILURE;
 212                         }
 213                 }
 214  next:
 215                 if (ENABLE_FEATURE_CLEAN_UP && isdir)
 216                         free(dest);
 217         }
 218
 219         return ret;
 220 }